Malicious PDF — malware analysis report

Static analysis result for SHA-256 7466b07ee8ede2a4…

MALICIOUS

PDF

40.0 KB Created: 2020-10-06 10:00:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f75aacb75d052bffe7c905c199c9d4bb SHA-1: b1a3f9226736b3c0a9af7d9f123cc21cf20ef24b SHA-256: 7466b07ee8ede2a4eea93cd5c2355e40d55a2e7b52f80351ba648d18957f6c80
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains text related to 'Blue Cross Blue Shield' and a URL that mirrors this context, suggesting a phishing lure. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://cctraff.ru/strik?keyword=blue+cross+blue+shield+of+il+prior+auth+form In PDF document text
    • http://tusepo.llimmigrationlaw.com/uploads/1/3/0/8/130874620/7a559599c06.pdfIn PDF document text
    • http://files.fresnocatering4u.com/uploads/1/3/1/3/131398374/vabalisivalonewanisu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6354/8831/files/indian_mp3_ringtone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6232/8472/files/fevoxakenanibigabugo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3996/0487/files/dutusunurosufitodel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5523/4710/files/bible_study_lessons_for_young_adults.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4930/4742/files/memegiraxatabuku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44b00eed-acc0-402e-9194-5ff123ca3e37/62157137520.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd287f91-f5d7-464b-be74-2016230e5005/beguxawiwawudenixirekujuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b7320cb-9102-421a-b948-4cdb9b8db295/nudovufuf.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C6F 5584 bytes
SHA-256: dfad1f3a25714e30fc421778fdf447f02accf43e4e700364bd57faf8f9d8b7fe
font_01_sfnt_off00006f3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3B 10488 bytes
SHA-256: 767cf3a3cbfa3791c9e5975864f01a2ffce727efc2f35a911817c9f575994348

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